Application of the growth substrate pulsed feeding technique to a process of chloroform aerobic cometabolism in a continuous-flow sand-filled reactor

Aerobic co‐metabolism of 1,1,2,2‐tetrachloroethane by Rhodococcus aetherivorans TPA grown on propane: kinetic study and bioreactor configuration analysis

“…Although CAH biodegradation has been extensively studied both in terms of metabolic pathways and related microorganisms, a very limited number of studies on the biodegradation of chloroethanes, and particularly on TeCA, has been reported . Further, TeCA bioremediation strategies have been mainly evaluated under anaerobic conditions, while it has long been considered non‐biodegradable under aerobic conditions .…”

PVC degradation by Fenton reaction and biological decomposition

“…Ultrasound was also used for polyvinylacetate (PVAC) and polyethyleneoxide (PEO) degradation [13]. Except chemical procedures considerable part of scientific research is focused on the biodegradation of PCE, TCE and DCE by genus Dehalococcoides [23,24].…”

Chloroform aerobic cometabolic biodegradation in a continuous‐flow reactor: Model calibration by means of the gauss‐newton method

“…A flow‐sheet of the experimental setup is provided in Figure . Initial fluid‐dynamic tests in the absence of biodegradation, consisting in pulses of only CF, only butane, or only O 2 , were aimed at estimating the CF and butane retardation factors δ CF and δ B , the effective porosity ϵ eff , the longitudinal dispersivity α L , and the kinetic constant of O 2 abiotic consumption k O2,abio . The subsequent bioreactor operation was divided into 4 phases, and the main experimental details are reported in Table .…”

“…Schematic flow‐sheet of the experimental plant: 1‐ CF‐butane feeding bag; 2‐ CF feeding bag; 3‐ CF‐O 2 feeding bag; 4‐ 3‐way valves; 5‐ timer; 6‐ peristaltic pump; 7‐ column reactor with 40 teflon‐lined sampling ports; and 8‐ granular carbon filter. Reprinted with permission from Frascari et al (copyright 2012 Elsevier).…”

“…In this work, the above‐described procedure of model development was applied to the experimental data obtained during a 210‐day study of chloroform (CF) AC with butane as substrate and with pulsed growth substrate/oxygen supply, conducted in a 2‐m sand‐filled column simulating a cylindrical aquifer portion. The experimental approach and the main results were previously described by Frascari et al CF, a frequent contaminant of surface and ground waters, is widely used in the production of other chemicals and as a solvent…”